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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07760a22ad7cae816f22a98277b62a51fb85bde4c11daf7ba4e6d35b211922b5' 
  AND token = 'j4Qn5KgljzR2q/mU559WJKwQMXbNzlxzX9s0ENmEJPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00089

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}